sister-in-law

noun

sis·​ter-in-law ˈsi-st(ə-)rən-ˌlȯ How to pronounce sister-in-law (audio)
-tərn-ˌlȯ
plural sisters-in-law ˈsi-stər-zən-ˌlȯ How to pronounce sister-in-law (audio)
1
: the sister of one's spouse
2
a
: the wife of one's sibling
b
: the wife of one's spouse's sibling

Examples of sister-in-law in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
His sister-in-law lost both of her parents so Matt returned to California to help his brother and sister-in-law on her family farm. Rebecca Angel Baer, Southern Living, 20 Mar. 2025 Guests came from far and wide, starting with Prieto’s brother and sister-in-law, Alex and Roxana. Sara Murphy, Charlotte Observer, 17 Mar. 2025 Most notably, Taylor, the bride's sister-in-law and bridesmaid, leaned forward and opened her mouth so wide that couldn't open any further. Ashlyn Robinette, People.com, 17 Mar. 2025 Minch’s wife, their two young children, his sister-in-law and his niece all joined the voyage, which was under the command of Captain Albert Myer. Sarah Kuta, Smithsonian Magazine, 14 Mar. 2025 See All Example Sentences for sister-in-law

Word History

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of sister-in-law was in the 15th century

Browse Nearby Words

Cite this Entry

“Sister-in-law.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sister-in-law. Accessed 27 Mar. 2025.

Kids Definition

sister-in-law

noun
sis·​ter-in-law
ˈsis-t(ə-)rən-ˌlȯ,
-tərn-ˌlȯ
plural sisters-in-law
-tər-zən-
1
: the sister of one's spouse
2
a
: the wife of one's sibling
b
: the wife of one's spouse's sibling

More from Merriam-Webster on sister-in-law

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